**Basic Calculator Interface Features**

- easy to read number and function buttons
- several buttons for editing the formula: backspace and clear
- graph button to view the graph for the entered formula
- automatic closing of right parenthesis
- for example, you could type in
*“sin(x”*and the closing right parenthesis would be automatically added

- for example, you could type in

**Supported functions**

- Mathematical Operators
- addition, subtraction, division, multiplication
- unary minus

- Constants
- pi (3.141592653589793…)
- e (2.718281828459045…)

- Trigonometric Functions
- sin, cos, tan
- arcsin, arccos, arctan
- sinh, cosh, tanh
- arcsinh, arccosh, arctanh

- Exponential Functions
- log10 (log
_{10}) - log2 (log
_{2}) - ln (log
_{e}) - exp (e
^{x})

- log10 (log
- Mathematical Functions
- sqrt
- abs
- floor
- ceil
- ! (factorial)

**Graph Screen Features**

- one finger touch to pan the graph
- two finger pinch to zoom or unzoom the view of the graph
- grid can be toggled on and off
- locking the scale of the x and y axis can be toggled on and off